Plunger and cylinder packing.



P. G-RABLER.

PLUNGER ND CYLINDER PACKING. APPLICATION FILED JUNE 2. 1909.

Lmg, Patented Feb. s, 1912.

UNITED STATES ,PATENT OFFICE.

PETER GRABLER, ,or CLEVELAND, oHIo.

` PLUNGEB. AND CYLINDER linsomnie.

Specification of Letters Patent.

Application filed .Tune 2, 1909. Serial N0. 49,9,741. l i v To all whom t may concer Be it known that I, ln'rnn Gnannnn. citi',- zen of the United States, residing at Cleveland, in the county of Cuyalwga and State of Ohio, have invented certain new and useful Improvements in llunger and Cylinder Packing, of which the following is a speer fication. l

Heretofore it has been customary in pumps, engines and like structures employing cylinders and pistons .or plungers to provide the latter with various kinds of packing rings and grooves and other means for preventing leakage and to lnake a tight lit, as it were, between the bearing surface of the plunger'l and the inner wall of the cylinder. Packing rings, which are well known and their operation well understood, are reasonably effective in produeingthis tight lit or joint and in many pump strl'ietures, espe? cially pumps for liquids of variousA kinds, packing grooveshave been used very ellectively, but it is a 'fact that a plunger provided with more effective packing would be invaluable.

The object of the present invention, there` fore, is to provide a plunger or cylinder, preferably the former, with means used in conjunction either* with the packing rings already employed or independently for preventing the leakage around the plunger; for reducing the friction between the plluiger and the cylinder Wall; for preventing waste of the lubricant or fluid, and further to cause a'sort of cushioning effect on all sides ofthe piston, thus causing it to float or move more freely within the cylinder.

Still more specifically the invention relates to a cylinder and plunger wherein the bearing surface of one of the members, prefer-4 ably the plunger, is provided with a plurality of circtunferentihlly isolated pockets which are adapted to receive and permit the expansion of a portion of the fiuid, and thus hinder or prevent any further leakage between the parts and which will catch or hold the lubricant or Huid and prevent its wasting through between the parts.

The invention may be further brieiiy summarized as consisting, in the construction and combinations of elements hereinafter set forth in the following description, drawings and claim.

resents a cylinder Aand'plunger of a well known type wherein the latter is provided with my invention. .l

Any suitable `form and construction of plunger and cylinder or pistonand cylinder may be provided with my improved features, but .l have shown a well known type in Patented, Feb. o, 41912."

Referringv to the drawings, the 1figure repthe drawings, which is very effective invoperation, tind in such kembodiment the cylinder 1 is provided-with a pistonQ havin therein a wrist pin 3. Connected t0 this wrist pin is the usual connecting rod .4, a portion of which is shown in thedrawings.

The piston Q may be further providedwith suitable grooves 5 for receivingfl packing rings G' of au y preferred construction.

The description so far has been confined to features of ordinary construction which are well known 1n the art, but my lnvention eomprehemls the supplying ot the plunger with a plurality of circumferentially isolated pockets 7 arranged close together.

over the entire bearing surface of the plunn ger whereby upon the leakage of the motive fluid around the plunger at one point, and upon the expansion of such fluid into these pockets, further leakage is substantially prevented by reason of the fact that before fur ther leakage may take place, the expanded fluid, which has occupied some of the pockets, must be compressed again vand/before this may take place the plunger has .reached the end of its stroke. In any event the' exlpansion and passage around the plunger into several ofthese pockets will eliminate practically all the leakage of the motive tiuid in practically any type of pump Ior engine. Furthermore there is an additionaladvantage in the pockets`.in that they will catch and hold the lubricant and prevent its wasting through. i

Having described my invention, I claim :-..4

In combination, a cylinder, and a plunger having its bearing surface provided with a pluralityY oftransversely isolated pockets;

vIn testimony whereof I affix my signature in presence of two Witnesses.

PETER GRABLER. Witnesses.:

Gr.A O. Falcon-Hanson, B. W. Bnoonn'rr; 

